New sign-in alerts and welcome page appearing with 1Password for Safari (Safari version 18.3 beta)

I've installed the betas of the iOS/iPadOS 1Password app, as well as the macOS 1P for Safari extension. Very impressive list of changes to all of it, by the way. I've also updated to macOS 15.3 beta 2, where the changes are not that well documented. Early impressions are that the 1Password emails have been reduced from about 29/day to 2 in the last two days. I've also gotten the two Safari tabs on the Mac a couple times, which seem to indicate that the extension had crashed and restarted. So while it's not perfect it's a great improvement and much appreciated regardless of how it got fixed.